//------------------------------------------------------------------------------
// Name: cs8900.c
// Func: ethernet driver for use with LAN controller CS8900A
// Ver.: 1.1
// Date: January 2004
// Auth: Andreas Dannenberg
// MSP430 Applications
// Texas Instruments Inc.
// Rem.: -
//------------------------------------------------------------------------------
#include "msp430x14x.h"
#include "support.h"
#include "cs8900.h"
//------------------------------------------------------------------------------
const unsigned int MyMAC[] = // "M1-M2-M3-M4-M5-M6"
{
MYMAC_1 + (unsigned int)(MYMAC_2 << 8),
MYMAC_3 + (unsigned int)(MYMAC_4 << 8),
MYMAC_5 + (unsigned int)(MYMAC_6 << 8)
};
static const TInitSeq InitSeq[] =
{
PP_IA, MYMAC_1 + (MYMAC_2 << 8), // set our MAC as Individual Address
PP_IA + 2, MYMAC_3 + (MYMAC_4 << 8),
PP_IA + 4, MYMAC_5 + (MYMAC_6 << 8),
PP_LineCTL, SERIAL_RX_ON | SERIAL_TX_ON, // configure the Physical Interface
PP_RxCTL, RX_OK_ACCEPT | RX_IA_ACCEPT | RX_BROADCAST_ACCEPT
};
//------------------------------------------------------------------------------
// configure port-pins for use with LAN-controller,
// issue reset and send the configuration-sequence (InitSeq[])
//------------------------------------------------------------------------------
void Init8900(void)
{
unsigned int i;
P3OUT = IOR | IOW; //读写信号置高位 // reset outputs, control lines high
P3DIR = 0xff; //I/O脚为输出方式 // switch control port to output
P5OUT = 0; //数据线置0 // reset outputs
P5DIR = 0xff; //数据线为输出方式 // switch data port to output
DelayCycles(40000); // delay 10ms @ 8MHz MCLK to allow
DelayCycles(40000); // time for CS8900 POR
Write8900(ADD_PORT, PP_SelfCTL); // set register
Write8900(DATA_PORT, POWER_ON_RESET); // reset the Ethernet-Controller
do
Write8900(ADD_PORT, PP_SelfST); // set register
while (!(Read8900(DATA_PORT) & INIT_DONE)); // wait until chip-reset is done
for (i = 0; i < sizeof InitSeq / sizeof (TInitSeq); i++) // configure the CS8900
{
Write8900(ADD_PORT, InitSeq[i].Addr);
Write8900(DATA_PORT, InitSeq[i].Data);
}
}
//------------------------------------------------------------------------------
// writes a word in little-endian byte order to
// a specified port-address
//------------------------------------------------------------------------------
void Write8900(unsigned char Address, unsigned int Data)
{
P5DIR = 0xff; // data port to output
P3OUT = IOR | IOW | Address; // put address on bus
P5OUT = Data; // write low order byte to data bus
P3OUT &= ~IOW;
// toggle IOW-signal
P3OUT = IOR | IOW | (Address + 1); // and put next address on bus
P5OUT = Data >> 8; // write high order byte to data bus
P3OUT &= ~IOW; // toggle IOW-signal
P3OUT |= IOW;
}
//------------------------------------------------------------------------------
// writes a word in little-endian byte order to TX_FRAME_PORT
//------------------------------------------------------------------------------
void WriteFrame8900(unsigned int Data)
{
P5DIR = 0xff; // data port to output
P3OUT = IOR | IOW | TX_FRAME_PORT; // put address on bus
P5OUT = Data; // write low order byte to data bus
P3OUT &= ~IOW;
// toggle IOW-signal
P3OUT = IOR | IOW | (TX_FRAME_PORT + 1); // and put next address on bus
P5OUT = Data >> 8; // write high order byte to data bus
P3OUT &= ~IOW; // toggle IOW-signal
P3OUT |= IOW;
}
//------------------------------------------------------------------------------
// copies bytes from MCU-memory to frame port
// NOTES: * MCU-memory MUST start at word-boundary
//------------------------------------------------------------------------------
void CopyToFrame8900(void *Source, unsigned int Size)
{
unsigned int *pSource = Source;
P5DIR = 0xff; // data port to output
while (Size > 1)
{
P3OUT = IOR | IOW | TX_FRAME_PORT; // put address on bus
P5OUT = *pSource; // write low order byte to data bus
P3OUT &= ~IOW; // toggle IOW-signal
P3OUT = IOR | IOW | (TX_FRAME_PORT + 1); // and put next address on bus
P5OUT = (*pSource++) >> 8; // write high order byte to data bus
P3OUT &= ~IOW; // toggle IOW-signal
P3OUT |= IOW;
Size -= 2;
}
if (Size) // if odd num. of bytes...
{
P3OUT = IOR | IOW | TX_FRAME_PORT; // put address on bus
P5OUT = *pSource; // write byte to data bus
P3OUT &= ~IOW; // toggle IOW-signal
P3OUT |= IOW;
}
}
//------------------------------------------------------------------------------
// reads a word in little-endian byte order from
// a specified port-address
//------------------------------------------------------------------------------
unsigned int Read8900(unsigned char Address)
{
unsigned int ReturnValue;
P5DIR = 0x00; // data port to input
P3OUT = IOR | IOW | Address; // put address on bus
P3OUT &= ~IOR; // IOR-signal low
ReturnValue = P5IN; // get low order byte from data bus
P3OUT = IOR | IOW | (Address + 1); // IOR high and put next address on bus
P3OUT &= ~IOR; // IOR-signal low
ReturnValue |= P5IN << 8; // get high order byte from data bus
P3OUT |= IOR;
P5DIR = 0xff; // data port to output
return ReturnValue;
}
//------------------------------------------------------------------------------
// reads a word in little-endian byte order from RX_FRAME_PORT
//------------------------------------------------------------------------------
unsigned int ReadFrame8900(void)
{
unsigned int ReturnValue;
P5DIR = 0x00; // data port to input
P3OUT = IOR | IOW | RX_FRAME_PORT; // access to RX_FRAME_PORT
P3OUT &= ~IOR; // IOR-signal low
ReturnValue = P5IN; // get 1st byte from data bus (low-byte)
P3OUT = IOR | IOW | (RX_FRAME_PORT + 1); // IOR high and put next address on bus
P3OUT &= ~IOR; // IOR-signal low
ReturnValue |= P5IN << 8; // get 2nd byte from data bus (high-byte)
P3OUT |= IOR;
P5DIR = 0xff; // data port to output
return ReturnValue;
}
//------------------------------------------------------------------------------
// reads a word in big-endian byte order from RX_FRAME_PORT
// (useful to avoid permanent byte-swapping while reading
// TCP/IP-data)
//------------------------------------------------------------------------------
unsigned int ReadFrameBE8900(void)
{
unsigned int ReturnValue;
P5DIR = 0x00; // data port to input
P3OUT = IOR | IOW | RX_FRAME_PORT; // access to RX_FRAME_PORT
P3OUT &= ~IOR; // IOR-signal low
ReturnValue = P5IN << 8;
